The present invention relates to: a compound for an organic optoelectronic diode, represented by a combination of chemical formulas 1 and 2; an organic optoelectronic diode comprising the same; and a display device comprising the organic optoelectronic diode. The detailed contents of formulas 1 and 2 are the same as those defined in the specification.

The present invention relates to organic light emitting elements, comprising thermally activated delayed fluorescence (TADF) emitters and/or hosts of formula ##STR00001##
which have a sufficiently small energy gap between S.sub.1 and T.sub.1 (ΔE.sub.ST) to enable up-conversion of the triplet exciton from T.sub.1 to S.sub.1. The organic light emitting elements show high electroluminescent efficiency.

Provided is a semiconductor nanoparticle-containing composition capable of forming a wavelength conversion layer that efficiently converts the wavelength of excitation light and exhibits sufficient luminescence intensity. An aspect of the semiconductor nanoparticle-containing composition of the present invention contains semiconductor nanoparticles (A) and a coloring matter (B) and further contains a polymerizable compound (C), in which the semiconductor nanoparticles (A) have a maximum emission wavelength in the range of 500 to 670 nm over a wavelength range of 300 to 780 nm, and the coloring matter (B) contains at least one selected from coloring matters (B1) to (B5) having specific structures.

A heterocyclic compound and an organic light-emitting device including the same are provided. The heterocyclic compound is represented by Formula 1: ##STR00001## Details of R1, R2, R3, X1, L1, and a1 and b1 are provided in the disclosure.

The present invention relates to a compound represented by the following General Formula (1) or a salt thereof.

##STR00001##

In General Formula (1), R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each independently represent a hydrogen atom, a linear or branched alkyl group which may have a substituent or the like. R.sup.1 and R.sup.2 may be bonded to each other to form a ring. R.sup.3 and R.sup.4 may be bonded to each other to form a ring. R.sup.1 and/or R.sup.2 may be bonded to a 6-membered ring to which —NR.sup.1R.sup.2 is bonded to form a ring. R.sup.3 and/or R.sup.4 may be bonded to a 6-membered ring to which —NR.sup.3R.sup.4 is bonded to form a ring. R.sup.5 represents —.sup.11CH.sub.3, a linear or branched alkyl group which may have a substituent or the like. R.sup.6 represents —F, —.sup.18F or the like. X, Y and Z each independently represent a carbon atom, an oxygen atom or the like. n is 0 or 1.

A composition includes two or more near infrared absorbing compounds having an absorption maximum in a wavelength range of 650 to 1000 nm and having a solubility of 0.1 mass % or lower in water at 23° C., in which the two or more near infrared absorbing compounds include a first near infrared absorbing compound having an absorption maximum in a wavelength range of 650 to 1000 nm, and a second near infrared absorbing compound having an absorption maximum in a wavelength range of 650 to 1000 nm which is shorter than the absorption maximum of the first near infrared absorbing compound, and a difference between the absorption maximum of the first near infrared absorbing compound and the absorption maximum of the second near infrared absorbing compound is 1 to 150 nm.

Embodiments of the present invention relate to an organic electronic device capable of ensuring high luminous efficiency, low driving voltage and high heat resistance, and improving color purity or lifespan.

A material for an organic electroluminescent device that is excellent in hole injection and transport abilities, electron blocking ability, stability in a thin film state, and durability is provided as a material for an organic electroluminescent device having high efficiency and high durability. Further, an organic electroluminescent device having low driving voltage, high efficiency, and a long lifetime is provided by combining the material with various materials for an organic EL device that is excellent in hole and electron injection and transport abilities, electron blocking ability, thin film stability, and durability, in such a manner that the characteristics of the materials can be effectively exhibited. An organic electroluminescent device comprising at least an anode, a hole transport layer, a light emitting layer, an electron transport layer, and a cathode in this order, wherein the hole transport layer comprises an arylamine compound of the following general formula (1). ##STR00001##

The present invention relates to a compound of the following formula (I). The invention also relates to uses thereof as a chromophore as such or for building pigments displaying special optical effects, including metal-like reflection. ##STR00001##

The present specification relates to a compound and an organic electronic device including the same.